Chora trees are large, living, tree-like constructs with trefoil-shaped leaves, created during the Age of Legends. It is said that they emitted a sense of peace for any who passed below their branches. They were grown in abundant quantities in the cities of old, especially in V'saine and Paaran Disen. They are grown by the songs of the Ogier and Nym.[verify]
Avendesora, the Aiel name  and the Wetlander name for the last-existing chora tree, found growing in Rhuidean means "Tree of Life" in the Old Tongue. It was severely damaged and burnt by the fight between Rand and Asmodean into Rhuidean, but analysing it with the One Power Moiraine assured that it was still living.
Avendoraldera was a sapling from Avendesora presented by the Aiel to Cairhien in 509 NE. It was a gift given to the people of the new city because the Aiel had determined that Cairhienin ancestors had provided their ancestors with water shortly after the Breaking. It was therefore a gift given to the city of Cairhien to satisfy the Aiel sense of honor for the aid they received when all other hands had turned against them. Along with the sapling, Cairhienin merchants were given free passage across the Aiel Waste provided they displayed the proper banners. In the histories, there are indications that Cairhien had no idea why they were privileged with such treasures or privileges.
Avendoraldera grew for four hundred years before King Laman cut it down with a mind to use its wood to build himself a magnificent and unique throne, thus precipitating the Aiel War and earning the Cairhienin citizens the Aiel epithet, "tree-killer."